【摘要】 填充橡胶材料的动态特性与预载、激振频率和激振振幅等相关。采用模型叠加方法,建立了用于计算的由填充橡胶材料制造的橡胶隔振器动态特性的弹性-粘弹性-弹塑性模型。其中,弹性模型用于表征橡胶隔振器的弹性部分,粘弹性模型用于表征橡胶隔振器动态特性与激振频率的相关性,弹塑性模型用于表征橡胶隔振器动态特性与激振振幅的相关性。对一试片进行静动态性能实验,得到其静、动刚度和滞后角,由其拟合得到了弹性、粘弹性、弹塑性模型的参数。计算了一动力总成橡胶隔振器的动态特性,并与实验结果进行了对比分析。结果表明,采用的弹性-粘弹性-弹塑性模型可以较好地表征橡胶隔振器动态特性的振幅相关性和频率相关性。其计算方法,可以用于橡胶隔振器动态特性的设计计算。更多还原

【Abstract】 Carbon filled rubber material is widely used in automotive industry for vibration control.The dynamic property of rubber materials is usually dependent on preload,excitation amplitude and frequency.A model by superimposing a elastic model,a viscoelastic model and a elastoplastic model is presented to model the dynamic property of a rubber isolator,which is made by carbon filled rubber material.In the model,elastic one is used to describe the elastic property of rubber isolator,viscoelastic one is imposed to describe the frequency dependency,and the elastoplastic one is applied to describe the amplitude dependency.The static and dynamic properties of a rubber specimen are obtained by experiment,and the experimental data are used to identify the parameters in the proposed model.The calculated dynamic properties of a powertrain rubber mount agree well with the experiment data.It is shown that the presented model can predict the amplitude and frequency dependency of a rubber isolator with small relative errors.The approach described in this paper can be used in the design and calculation for rubber isolators.更多还原